var FirObserImpl = require('./FirstObserverImpl.js');
var SecObserImpl = require('./SecondObserverImpl.js');
var Subject = require('./ISubject.js');

var subject = new Subject();
var firObser = new FirObserImpl();
var secObser = new SecObserImpl();

subject.attach(firObser);
subject.attach(secObser);
subject.doAction();